Interpretive Summary: Vegetable growers often grow a fall crop of cucumbers or squash after a spring crop such as tomatoes or peppers, without preparing the land again. This "double-cropping" method saves time and money because the same plastic mulch and drip irrigation tape are used for two crops instead of one. One problem is that root-knot nematodes may develop in the soil when the spring crop is grown and these nematodes can easily attack the young seedlings of the fall-planted crop. In these studies, a root-knot nematode resistant bell pepper variety (Charleston Belle) was planted as a spring crop to control southern root-knot nematodes (Meloidogyne incognita) in fall-cropped cucumber and yellow squash in South Carolina and Georgia. The highly resistant `Charleston Belle' reduced the development of root-knot nematodes in the soil, whereas its susceptible parent bell pepper, `Keystone Resistant Giant', allowed the development of very large numbers of root-knot nematodes. In the autumn, cucumber plants grown in the same soil where the resistant `Charleston Belle' had grown, produced 87% larger cucumber yields than cucumbers planted in soil where the susceptible bell pepper `Keystone Resistant Giant' had grown. In a second study, squash yields were 55% larger in soils previously planted to `Charleston Belle' than to `Keystone Resistant Giant'. These results demonstrate that root-knot nematode resistant bell pepper cultivars such as `Charleston Belle' will be useful for managing root-knot nematodes in double-cropped cucumber and squash.